Add debug logging for incoming CSAPI calls on authentication failure (#2116)
Add debug logging for incoming CSAPI calls on authentication failure (#2116)

* Add debug logging for incoming CSAPI calls on authentication failure

Will help to debug Complement failures, and just generally useful.

* Update httpapi.go

Co-authored-by: Neil Alexander <7f0e7998f0d3082a84355a2366a12924c14a9eda@users.noreply.github.com>
matrix-org/dendrite,matrix-org/dendrite,matrix-org/dendrite,matrix-org/dendrite